I need some of the foil tape that is used to connect AC ducts. What would I
look for on ebay? I need to put some sort of sealant between sheets of
steel roofing to cut down on air loss. In some places, the sheets are at a
ninety, so it will take a lot of weaving the tape around. Do you think the
tape would last very long in that application? Surface temperatures on it
will be 140+ in the summertime.
In these parts it's referred to as aluminum tape but alot of people just
say foil tape.
the 3M website actually has technical data on their aluminum foil tape
products and there are a few types for applications. I have a roll that
says it's good for 300 F but it also says best applied 24 months after
purchase so if buying on EBAY make sure it's not old stuff where the
adhesive has dried out.
A Company called Eternabond makes a variety of foil tapes for roofs.
I've never seen their products before and have of course never used them
but maybe they are worth investigating on google just to see.
Steve, I can't figure out what it is you are doing, but it doesn't sound
like conventional duct work. Think you may want to look at a product
called duct sealant, sometimes called hard cast. It is applied with a
paint brush, putty knife, roller, or caulk gun and can be reinforced
with nylon mesh similar to what Dryvit uses with the base coat, called
scrim. This stuff will work fine outdoors or indoors, most are designed
to work from below freezing to about 200. We use Childers CP 11. This
will be much easier to work with than the tape and there will be much
less chance of not sticking, etc. The latex mastics with a throw away
chip brush are great.
Here is an example of what I suggest:
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